Induced EMF - Does Voltage Change Matter?

Click For Summary
SUMMARY

The discussion centers on the principles of induced electromotive force (emf) in solenoids when subjected to varying voltage sources. When a solenoid connected to a 10V DC power supply is increased to 20V, the magnetic flux increases, and an emf is induced to oppose this change. Additionally, when switching to a 10V AC power supply, induced emf consistently opposes changes in magnetic flux, regardless of whether the change is due to internal current fluctuations or external influences, such as a moving magnet.

PREREQUISITES
  • Understanding of Faraday's Law of Electromagnetic Induction
  • Familiarity with solenoids and their operation
  • Knowledge of DC and AC power supply characteristics
  • Basic concepts of magnetic flux and its relationship to current
NEXT STEPS
  • Study Faraday's Law in detail to understand induced emf calculations
  • Explore the behavior of solenoids under different voltage conditions
  • Investigate the effects of AC power on magnetic fields and induced currents
  • Learn about applications of induced emf in electromagnetic devices
USEFUL FOR

Students of physics, electrical engineers, and anyone interested in the principles of electromagnetism and its applications in electrical systems.

whitegheghe10
Messages
1
Reaction score
0
Suppose now i have connected a solenoid with a dc power supply of 10V
When i increase the voltage to 20V the magnetic flux through the coil have increased
will emf be induced shortly to oppose the change?

what if i now change it to a 10V ac power supply
so will there always be induced emf to oppose the change?

I am not clear about whether emf will be induced as a result of change in flux just due to change in its own current or will it occur only when the change is cause by external agent ( for example pushing a bar magnet towards the solenoid)
 
Physics news on Phys.org
whitegheghe10 said:
Suppose now i have connected a solenoid with a dc power supply of 10V
When i increase the voltage to 20V the magnetic flux through the coil have increased
will emf be induced shortly to oppose the change?
Yes.

whitegheghe10 said:
what if i now change it to a 10V ac power supply
so will there always be induced emf to oppose the change?
Yes.
whitegheghe10 said:
I am not clear about whether emf will be induced as a result of change in flux just due to change in its own current or will it occur only when the change is cause by external agent ( for example pushing a bar magnet towards the solenoid)
Both.
 

Similar threads

High School EMF induced by Bar Magnet falling through a Coil
  • · Replies 3 ·
Replies
3
Views
2K
High School Understanding magnetic flux change during the falling of magnet
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Questions about cancelation of induced EMF and minimizing eddy currents
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Why does a change of magnetic flux induce an EMF?
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad Motional EMF in Faraday disc, co-rotating magnet axial mean flux
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad Induced electric fields and induced magnetic fields confusion
  • · Replies 9 ·
Replies
9
Views
4K
Undergrad How does a ferromagnet increase the inductance of an inductor?
  • · Replies 3 ·
Replies
3
Views
2K
High School EMF Induction in a Loop of Wire - Does It Work?
  • · Replies 3 ·
Replies
3
Views
18K
Undergrad How Does the Maxwell-Faraday Law Apply to Stealth Magnets and EMF Induction?
  • · Replies 27 ·
Replies
27
Views
3K
Undergrad Does an inductor always create a back EMF?
  • · Replies 14 ·
Replies
14
Views
4K